Photographic camera having selfcapping shutter mechanism, etc.



Jam 21, 1941. E. s. HIINELINE 2,229,606

PHOTOGRAPHiC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

'Filed Dec. 3, 1938 14 Sheets-Sheet 1 INVENTOR. r 5:?60/ .65 #27 652 BYf L fl- ZMHZM ..J M.

ATTORNEYS.

PHOTOGRAPHIC CAMERA HAVING SELF-CAfPING SHUTTER MECHANISM, ETC

Filed Dec. 3, 1938 14 Sheets-Sheet 2 IN VENTOR 3 (Q8017 64727666176 -flif @749 4.; 4

ATTORNEYS.

1941- E. s. HINEL-INE 2,229,606

PHOTOGRAPHIC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

Filed Dec. 3, 19 38 14 Sheets-Sheet 3 ATTORNEYS,

Jan. 21, 1941. E. s. HINELINE 2,229,606

PHOTOGRAPHIC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

14 Sheets-Sheet 4 Filed Dec. 3, 1938 INVENTOR. [ciao/ d. f/arye Z67 6.

ATTORNEYS.

1941- E. s. HINELINE 2,229,606

PHOTOGRAPHIC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

Filed Dec. 5, 1938 I 14 Sheets-Sheet 5 INVENTOR.

ATTORNEY 6 Jan. 21, 1941. E. s. HINELINE 2,229,606

PHOTOGRAPHIC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

Filed Dec. 3, 1938 14 Sheets-Sheet 6 ATTORNEY S faisoydf fib'vezave////}I //iI// Jan. 21, 1941. E. s. HlNELlNE 2,229,606

PHQTOGRAPHIC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

Filed Dec.

14 Sheets-Sheet '7 IIIIIIIIIIIIIIIH INVENTOR. [6260/7 AS flayezvc BY 7537%, $4 21,12. 44:4, ATTORNEYS Jan. 21, 1941- E. s. HINELINE Filed Dec.3, 19:58

14 Sheets-Sheet 8 A INVENTOR. d6 0/ J6! fla'lyeza'lpe DQ323323 i G D DQB Q Q Q Q Q ammo ATTORNEY-S.

Jan. 21, 1941. 2,229,606

HAVING SELF-CAPPING SHUTTER MECHANISM, mc

E. s. HlNELlNE PHOTOGRAPHIC CAMERA 14 Sheets-Sheet 9 Filed Dec. 3, 1938ATTORNEYS.

3m 1941- E. s. HINELINE 2,229,606

CAPPING SHUTTER MECHANISM PHOTOGRAPHIC CAMERA; HAVING SELF ETC FiledDec. :5, 193a l4 Sheets-Sheet 1O mum:

ATTORNEYS.

Jan. 21, 1941. E. s. HINELI NE 2,229,606

PHOTOGRAPHIC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

l4 Sheets-Sheet 1] Filed Dec. 3, 1938 Q3 NI I I l l I l l l l l l l l I:1 3 1 NS 1 v L 2: H in I 1||| v %1 n w 2T fi 0 a2 oi I C Q o! hmLWM-ufiw NVENT YUM [@7607 1190776 4 8 5 {96 WWW/m ATTORNEYS.

1941- E. s. HINELINE 2,229,606

PHOTOGRAPHIC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

Filed Dec 5; 1938 14 Sheets-Sheet 12 INVENTQR.

'7 '5'. 6 a'7eZz'7 e ATTORNEYS.

Jan. 21, 1941. E. s. HlNELlNE PHOTOGRAPHIC CAMERA HAVING SELF-CAPPINGSHUTTER MECHANISM, ETC

l4 Sheets-Sheet 13 Filed Dec. :5, 1938 Jan. 21, 1941. E. s. HINELINE2,229,506

PHOTOGRAPHIC CAMERA HAVING SELF-CAPPING SHUTTER MECHANISM, ETC

Filed Dec; 3, 1938 QQwN Patented Jan. 21, 1941 UNITED STATES PATENTOFFICE P HOTOGRAPHIC CAMERA HAVING SELF- CAPPING SHUTTER MECHANISM, ETC.

Application December 3,1938, Serial No. 243,820 31 Claims. (01. 9557)This invention relates to new and useful improvements in photographiccameras; and particularly to the shutter mechanism thereof.

In order that the principle of the invention may be readily understood,I have disclosed a simple embodiment thereof in the accompanyingdrawings, wherein a Fig. 1 is a top plan view of the camera showing thefilm winding, shutter knob, the shutter speed set knobs and the filmrewind knob;

,Fig. 2 is a front elevation of the camera;

Fig. 3 is a right side view thereof with the lens mount collapsed;

Fig. 4 is-a right side view thereof with the lens mount extended;

Fig. 5 is a rear view of the camera upon a larger scale showing thetake-up spool and measuring sprockets, the aperture opening and thefilm-rewind dog;

Fig. 6 is a longitudinal vertical sectiontaken through Fig. 1, lookingtoward the focal plane, and showing the relative positions of the par-tsof the mechanism, and with the film magazine in place;

Fig. 7 'is a vertical transverse section through thetake-up spool andwinding knob;

Fig. 8 is an enlarged detail in perspective of the take-up shaft;

Fig. 9 is a similar enlarged detail of a winding knob;

Fig. 10 is a similar enlarged detail of the counter dial;

Fig. 11 is a transverse section through the take-up spool drive on theline i|ll of Fig. '7;

Fig. 12 is an enlarged detail in perspective of the takeup' spool shaftspacer;

Fig. 13 is a similar enlarged detail of the shutter driving gear; 7

Fig. 14 is an enlarged transverse section on the section line Ml4 ofFig. 16 at the time of the commencement of the second curtain travel;Fig. 15 is an enlarged detail in perspective of one of the curtainsheaves and a fragmentary.

part of the index plate showing the means for connecting the twotogether;

Fig. 16 is an enlarged vertical section through the shutter settingmechanism setting forth clearly the method of assembly;

50 Fig.1? is an enlarged perspective view of the 'curtain barrel showingthe relation of the release Fig. 18 is an enlarged perspective detail ofthe shutter shaft together-with the slow shutter 55 cam and the shutterwinding pin;

Fig. 19 is an enlarged detail elevation of the shutter index plate;

Fig. 20 is a side view of Fig. 19;

Fig. 21 is a vertical section taken through the curtain take-up rollers,and showing the con- 5 struction of these rollers and their relation tothe two curtain parts;

Fig. 22 is a plan view of the shutter winding dog when the shutter isall the way wound up and in tripping position; 10

Fig. 23 is a view similar to Fig. 22, excepting that the shutter hasbeen released and has run to the all-the-way down position;

Fig. 24 is a view similar to Fig. 22 but illustrating how the shutterdog picks up the 'shut- 15 ter pin when rewinding .the shutter;

Fig. 25 is a vertical section through the camera upon a larger scale,and showing the shutterrelease mechanism with the curtain wound all thew y p; 29

Fig. 26 is a view similar to the upper portion of Fig. 25, butindicating the position of the parts when the release button has beendepressed;

Fig. 27 is a vertical section of a portion of Fig.

25 on the line z1 z1 of that figure; 25

Fig. 28 is a perspective detail of the release dog;

Fig. 29 is a top plan view, with parts in section, of the shutteroperating mechanism, parts of the case being broken away, and the.shutter 30' being represented as fully wound up and set for one-secondexposure;

Fig. 30 is a partial detail of the shutter curtains, with the curtainspositioned for the starting of an exposure; I 35 Fig. 31 is an enlargedtop plan view, particularly showing the slow-speed dial detent;

Fig. 32 is a longitudinal section of Fig. 6 on the line 3232 thereof;

Fig. 33 is a horizontal section through the range finder;

Fig. 34 is an enlarged detail of the slow-shutter-speed-setting dial;

Fig. 35 is a horizontal longitudinal section showing the placement ofthe camera mechanism, the film take-up spool, the film magazine and thepressure pad;

Fig. 36 is a top plan view upon an enlarged scale of the shuttermechanism with parts broken away showing the release button dcpressed,the first curtain partially open and the shutter mechanism set forone-second exposure, the timing element for-the slow shutter mechanismalso being clearly shown; 5

- one second;

Fig; 40 is a View similar to Fig. 37 but representing the first curtainas having traveled all the way across the exposure opening, pressure onthe release button having been removed; v

Fig. 41 is a. view similar to Fig. 39, but representing the secondcurtain as having traveled all the way across the exposure opening andthe slow speedmechanism as having been returned to re-set position;

Fig. 42 is a detail in plan of the first curtain;

Fig. 43 is a detail in plan of the second curtain;

and

Fig. 44 is a detail in plan of a portion of the film strip.

Reference is more particularly made to the drawings wherein is discloseda single embodiment of my invention, to which, however, my invention isnot restricted.

The photographic camera herein disclosed has many unique features whichlend themselves to precision production methods of manufacture. Thecamera is unique in the placement and structure of its various parts,which afford a symmetrical and well balanced design without in any wayimpairing the operation of the camera. One of the most importantfeatures thereof is a focal plane shutter of the two-part curtain typewhich allows for a plurality of adjustments in the width of the curtainaperture. A further feature consists of novel means for controlling oneof the curtains so that it is retarded, per-' mitting exposures ofrelatively long duration. Another feature is a one-knob constructioncontrolling the film wind, shutter wind and exposure counter. Theconstruction is such that it is impossible to make a double exposure orto produce a blank due to winding without making an exposure. Anotherfeature is a built-in range finder that is coupled to the focusingmount. Still another feature is a shutter construction that allows bothcurtains to run free upon release, there being no gears in mesh at thetime of exposure, although the gear train which controls the winding ofthe shutter and the feeding sprocket from the film wind is always inmesh. The construction is such that it is necessary to wind the film fora complete frame before the shutter can be released. The whole camerahas been constructed as a rigid structure that will at all timesmaintain accurate placement of the various parts and a uniform operationthereof..

A full understanding of the featuresof this invention will be had byreferring to the drawings herein, wherein is disclosed the preferredembodiment to which may invention is not limited, except as set forth inthe claims.

The case of the camera, which may be of any desired and appropriateform, is represented at A in the variousfigures of the drawings. In Fig.l the shutter or film winding knob is represented at I and thecounterdial at 2, it being frictionally connected to the winding knob lin a manner more fully disclosed hereinafter. Short extending knobs 3are provided for the purpose of changing the position of the dial 2 withrespect to the knob l The shutter speed setting knob is shown at 4 andthe shutter speed setting dial at 5. By means of this knob and dial theso-called instantaneous speeds are obtained (that is, speed from 5 of asecond to .001 of a second) and the bulb position is obtained on thisdial when the slow shutter speed dial is properly set, the slow shutterspeed knob being shown at G and the slow shutter speed dial at I. Thesocalled slow shutter speeds (that is, speeds from .1 of a second to onesecond or longer) are obtained by the proper manipulation of said knob 6with respect to the dial 1. A film rewind knob is shown at 8, thepurpose thereof being to rewind the film back into the magazine after anentire exposure has been made. The eye piece of the range finder isshown at 9 and the shutter release button by which all exposures aremade is shown at It).

Referring to Fig. 2, t..-e focusing mount is indicated generally at Hand the focusing knob is shown at 12 by means of which the focusingmount is caused to rotate in a threaded nut thereby changing theposition of the lens in a forward or backward direction with respect tothe focal plane. A knurled ring I4 is provided on the forward part ofthe focusing mount for use in extending the lens barrel. Thisconstruction is more clearly shown in Figs. 3' and 4. Screws l5, l5 areprovided for holding the focusing mount to the camera case A. A hinge I6is provided for the camera case cover; the lens is represented at H, anda cover latch of the conventional sliding type for maintaining the coverin a closed position is indicated at IS. The casing A is provided with asmall opening 20 for the range finder. The range finder negative lens isindicated at 2|, and the camera case cover itself is indicated at 22 inFigs. 3 and 4.

Referring now to Fig. 5, the eye piece lens of the range finder isindicated at 23, and a film rewind dog at 24. Filmwinding sprockets areshown at 25, 25. A sprocket release button is provided at 26, and asprocket shaft 21 is suitably mounted to receive the sprockets 25, 25. Asprocket shaft dog pin is provided at 28. The sprockets 25 have aprojecting hub with a series of notches 29 through which the pin 28 isforced by a coiled spring 30. When the pin 28 is in the positionshown inFig. 5 the sprockets 25, 25 are connected to the gear train through agear 3|, shown in dotted lines in Fig. 5 and more clearly shown in Fig.6. The purpose of the described construction is to allow the sprockets25, 25 to be disengaged from the gear train when the re winding of thefilm takes place. A cover casting 32 is provided that serves tocover upthe parts of the shutter and at the same time form the focal plane ofthe camera. The said cover casting 32 is provided with raised guides 33,33 on either side of the exposure opening 34. Two additional guides 35,35 serve to keep the film strip in position when traveling across thefocal plane. A film roller is shown at 36 over which the film passes onits way to the suitably mounted film take-up spool 31 which is providedwith flanges 38, 38 to further serve as a means of keeping the film inthe proper alignment. The said film spool 31 is driven through a springclutch member 39, more fully explained hereinafter. A film magazine 40,more clearly shown at the right disclosed hereinafter.

in Fig. 6, is placed in a space provided for it under dog 24. The filmis threaded across the exposure opening 34, the perforations in the filmB, Fig. 44, engage the teeth of the sprockets 25, 25, and the filmpassesover roller to roller 31, where the end of the film B isslipped under aretaining spring 4I more clearly shown in Fig. 35. The path of the filmB just referred to is also very clearly shown in Fig. 35.

Fig. 6 clearly shows in section longitudinally of the camera theplacement of the various parts described together with the placement ofthe shutter parts. When the film and shutter winding knob I is turnedcontraclockwise, a gear 42, shown at the lower left hand, end of Fig. 6,is caused to rotate with it by means more fully disclosed-presently,driving gear 43 on stud and a shutter reset gear 45 on stud 46 and idlergear 41 on shoulder screw 48 and idler gears 49, on

shoulder screw 5|, all suitably mounted in the casing. The gears 49 and50 are keyed together and so revolve as a unit, driving an idler gear 52mounted on a shoulder screw 53. This, in turn, drives measuring sprocketgear 3|, shaft 21 and the said sprockets 25, 25. It will now be seenthat when the knob I is turned, the film B having previously beenthreaded, sprockets 25, 25 will pull the film out of the magazine 48 andallow only so much to be fed as one turn of sprockets 25, 25 will feed.The film then passes across the focal plane and is wound up on the spool31 as previously described. When the winding knob I is turned to windthe film B, it causes to be driven the gear 45 which carries integraltherewith a shutter rewind pawl 54, shown in detail in Figs. 22 to 24,which causes the shutter to be rewound through the contact of springpawl 54 with pin 55 attached to the shutter shaft cam 58, more clearlyshown in Fig. 6 and in detail in Fig. 18, causing shutter to be rewound.The construction of the shutter mechanism will be more fully Therotation of knob I completely to rewind the shutter is just sufficientto turn the film winding sprockets 25, 25 one complete revolution.

Fig. 7 shows clearly and upon a larger scale the film winding mechanism,including the film-shutter winding knob I, and film counter dial 2,itself more clearly shown in detail in Fig. 10. The said counter dial isso constructed as to form a friction drive through the flexible portion51 of said dial engaging the inner portion of the knob I. The purpose ofthis is 'to enable the operator to reset dial 2 with respect to the knobI after the film B has been loaded into the camera and wound far enoughto be in position for the first exposure. Said knob I is attached to ashaft 58 by means of a milled end 59, more clearly shown in Fig. 8. Overthe said milled end the knob I is fitted, it having an opening of asuitable shape to key it to shaft 58, Fig. 9. It is then held in placeby screw 80. It will be noted that when the knob I is turned in acontraclockwise direction, the shaft 58 and dial 2 will also be turnedin the same direction. It is necessary that this knob be capableof beingturned in one direction only and therefore a spring clutch GI is placedabout the shaft 58 in the form of a coil and anchored in the casecasting A, the other end of the spring being free.

When the knob I is turned in a contraclockwise direction, the spring BItends to open up and enlarge, allowing the shaft 58 to turn freely.When, however, it is attempted to turn the knob I in a clockwisedirection, the spring 6| is caused to wind around the shaft 58, thuslocking it and preventin the said shaft turning in a clockwise The saidsleeve 64 is clearly shown in Fig. 12..

Also over said milled end is placed gear 42 which is held in position byscrew 65. Said gear 42 is more clearly shown in Fig. 13. The sleeve 64extends through bearing 66 in the lower portion of the camera case A.Theupper end of said shaft 58 is provided with a pin 68a, whichv engageswith a film spool driving dog 61 shown in Fig. '7. Said dog engagesdriving clutch 39 by reason of having two extending bosses 68, 68 engageholes 59, 68 more clearly shown in Fig. 11. The knob I is turned in acontraclockwise direction carrying with it shaft 58, pin 66a, drivingdog 61 and clutch spring 38, and the film take-up roller 31 with itsflanges 38, 38 is caused to be driven with it. The spool 31, however, isfree to slip in this assembly so that only that portion of the film Bthat has been fed by the sprockets 25, 25 is caused to be wound up. Thismaintains a slight tension on the said film between spool 31 andsprockets 25, 25, thus helping to preserve the alignment of the filmacross the exposure opening. The film magazine 40 is placed in positionand the film is threaded across to the take-up spool 31 as previouslydescribed and is Wound in position to No. 1 exposure. The dial 2 is thenrotated through the aid of pins 3, 3 until the zero indication appearsopposite the exposure indicating arrow I8, clearly shown in Figs. 1, 31and 33.

The magazine 40, shown most clearly in Figs. 6 and 35, is made up of thefollowing parts, viz: an inner barrel I2 which is free to rotate in saidmagazine 40, flange end I3, and flange end I4, an outer barrel 14a and afiat key I5 across the said inner barrel I2. The fiat key I5 is used forrewinding the film after the exposures have been made.

Fig. 6. The knob 8 is provided with an inwardly extending shaft 16'which carries a cross pin 11 free to slide up or down in a slot I8 of asuitably positioned driving member I9, thus enabling the operator toslide the winding knob 8 well above the camera formore convenientwinding. When rewinding, it is necessary to depress the button 26 so asto disengage the sprockets 25, 25. In order to remove the magazine 40from the camera, it is necessary to disengage the film drive dog 24(Figs. 5 and 6) from the film cross bar I5. This can only be done whenthe camera door or cover 22 is open because attached to said camera dooror cover 22 is a latch bracket 80 which has two extending arms fittinginto groove 8| of the driving member I9 when the door is closed. This ismore clearly shown in Fig. 6. When the door or cover 22 is opened, thelatch bar 80 is withdrawn from the groove 8|. When the knob 8 is pulledup, the pin 1! engages driving member I9, pulling it therewith to theend of its travel in bushing 82 held in place with a cover 8211, thuswithdrawing To accomplish this readily, the following structure is used,shown most clearly in the dog 24 from the film magazine 40, allowing theready removal of the magazine.

I will now refer to anddescribe in detail the shutter mechanism. Theshutter as herein disclosed is made up of parts shown most clearly inFigs. 14 to 1'7. Therein is shown a section of tubing 83 havingkeyedends 84, 84, to which are attached disks 85, 85 carrying pins 86and 81. This construction is most clearly shown in Fig. 1'7. Throughthis assembly is placed a bushing 88, shown in Fig. 16. roller 83,constructed as just described, are assembled a sheave 89 and 89A, bestshown in position in Fig. 6. The sheave 89, shown in Figs. 15 and 16, isassembled on the top of the said ourtain roller, and the sheave 89A isassembled at the bottom of the said curtain roller 83. This assembly fcurtain roller and the two curtain sheaves is then assembled on shaft 90which has assembled to it the cam plate 56, shown most clearly in Fig.18. Said cam plate 56 carries notches 9I which are engaged by extendingparts 92 on sheave 890., after which curtain roller 83 is then placed onshaft 90 and the second sheave 89A is placed over shaft 90. The lowerend of the shaft 90 is carried in a bearing 93, clearly shown in Fig. 6,the said cam plate 56 being on the lower ,side of the inner camera wall,the lower sheave curtain roller 89A being mounted on the upper side ofthe lower inner camera wall, the upper sheave 89 being just below theupper camera wall and supported in a bearing 94. Then a shutter indexplate 95, shown separately in Fig. 19 as in position in Fig. 16, havinga hub 95a and cut-out places 96, is assembled through bearing 94 intosheave 89, engaging bosses 92. The said index plate 95 is also veryclearly shown in Fig.

20. Said index plate 95 is equipped with a squared opening 91 at theupper end to engage the squared end of the shaft 90. Said index plate 95has a series of holes 98, 98. The function of these holes will be laterset forth. Also attached to said index plate 95 are pins 99 and I00. Thepin 99 provides a retarding means functioning as such when the firstcurtain runs down, as will be more clearly set forth hereinafter. Thepin I00 provides a definite stop when the first curtain runs down andwhen the shutter is rewound.

It will be seen from the foregoing description that the two sheaves 89,89A, the cam plate 56, shaft 90 and index plate 95, and shutter speeddial are all connected together and revolve as a unit.

It will be noted that, as shown in Figs. 6, 14, and 16, sheaves 89 and89A have slots IOI to clear pins 86 and 81 in the respective sheaves.This allows the curtain roller 83 to make approximately three quartersof a revolution within this assembly. In other words, said curtainroller 83 is freetoturn upon shaft 90 for that part of a revolutionequal to the length of thes lots ml. The knob 4, as shown in Fig. 16,carries a pin I02 and slides over the hub 95a of the index plate 95. Insaid knob 4 is placed a coiled spring I03 held in position by shutterspeed plate or dial ,5 and nut I04, a screw I05 serving to lock nut I04.This assembly is clearly shown in Fig. 16 and in Fi 6. i

The gear 45 referred to in the description of Fig. 6 and shownalso inFigs. 22, 23 and 24, car ries attached to it a spring pawl 54 providedwith rivets I06, I06. When the winding knob I is turned, the gear 45 iscaused to rotate through On the ends of the curtain gears 42and 43 in acontraclockwise direction, carrying with it spring pawl 54. Fig. 23shows the position of the parts at the start of winding. When gear 45has made approximately one quarter of a revolution, said pawl 54 engagespin 55 which is attached to the cam plate 56 and therefore to shaft 90which is caused to travel with the gear. The position of first contactis shown in Fig. 24. This movement is continued for approximately threequarters of a revolution until the position shown in Fig. 22 is reached.Since pins 86 and 81 of the curtain roller 83 lie in slots I 0|, IOI,said curtain roller 83 will be caused to be carried along with the filmsheaves, thus winding up both curtainsthat is, the No. 1 curtainattached to film sheaves 89, 89A, indicated as C, and the No. 2 curtainattached to curtain roller 83, indicated at D. This relationship isclearly shown in Fig. 21, wherein the shutter is set for an exposure.Since the gear train can only move in one direction because of theclutch 6I previously referred to, the shutter will remain wound up untilspring pawl 54 is moved away from contact with pin 55. 5

Fig. 21 is a fragmentary longitudinal section of the shutter mechanismshowing the placement of the two curtains. Curtain No. 1, indicated atC, is partially wound around curtain roller I08, which rides on a shaftI08A and has a spring IIO tending to cause a rotation thereof in aclockwise direction. Said spring H0 is anchored to said shaft I08Athrough hole III in shaft I08A and the other end of said spring isanchored in a hole H2 in bushing II3, which is permanently attached tosaid curtain roller I08. Since the two curtain take-up rollers aresimilar the same description applies to both I08, I09. Curtain shaftsI08A, I09A are attached to the camera case A through lock nuts H4,thereby providing adjustment for the tension of these curtain rollers.Also running on curtain roller shaft IOBA are two idlers I I5, II5,provided for The curtain No. 2, designated as D, is partially wound upon curtain roller 83 and has attached to the opposite end a strut Illand tapes H8, H8 which pass over said idlers I I5, I I5 on to take-uproller I09. Curtain C, which has previously been described as partiallywrapped on roller I08, is also provided on its outer end with strut H9and tapes I20 which are attached to curtain sheaves 89, 89A.

It will now be clearly understood that if the winding knob I is turnedall the Way to stop position, the curtain D will be rolled up on curtainroller 83, and curtain tapes I20 will be wound all the way up on sheaves89, 89A. The curtains C and D will appear as in Fig. 30, our- .tain Coverlapping curtain D. The entire curtain is now in position for makingthe exposure. The exposure is made by pressing on shutter release buttonI0, Figs. 1, 2 and 29. 'Pressure upon said shutter release button I0causes bar or spindle I2I, Fig. 29, suitably positioned in the cameracase A, to be moved rearward o'r inward. The said bar or spindle I2Icarries an enlarged section I22 to engage a pivoted finger I23.

Referring now particularly to Figs. 25 to 28, there is provided a camfinger I23 attached to a vertical shaft or rod I24, suitably mounted inthe camera case A, and also a cam plate I25, more clearly shown in Fig.28, having an upturned end I26 which fits into a fiat on the hub I21 ofcam finger I23. The opposite end of cam plate I has 9. turned downportion I28 which engages a cam face I29 of a cam plate I30 which isfastened to the shutter enclosure plate 32 with rivets I3I, I3I. Coiledabout shaft I24 is a spring I 32 which tends to cause said shaft I24 toturn in a contraclockwise direction. Spring I32 is fastened to shaft I24by means of a bent-in portion engaging a hole I33 in said shaft. Theother end of said spring rests against the camera case A. It will benoted that said spring I32 is both a torsional and a compression springtending to turn shaft I24 in a contraclockwise direction and at the sametime pushing it upward. When the shutter release button I0 is depressed,cam finger I23, constituting a release member, is caused to rotate in aclock-.

wise direction forcing cam plate I25 under the said cam face I29 in adownward direction, thus causing shaft I24 also tobe thrust in adownward direction, depressing winding pawl 54 to the position shown inFig. 37, thus releasing pin 55 (Figs. 22-24) which will allow shuttershaft cam 56 to rotate in a clockwise direction, and since said cam 56is a part of the curtain No. 1 assembly through shaft 90 and sheaves 89,89A, the said curtain No. 1, indicated at C, will be wound up on rollerI09, thus commencing an exposure. The timing of the exposure will dependupon how quickly curtain No. 2, indicated at D, on roller 83 isreleased.

I have previously pointed out thatv index plate 95 is keyed to shaft 90and that sheaves 89, 89A therefore travel with it. When shutter releasebutton I0 is depressed, a pawl or latch I34 of curtain D, shown mostclearly in Figs. 29 and 36, is caused to move in a clockwise directionunder the influence of a spring I35 coiled about its pivot, carryingwith it a second pivotal member I36 which is integral with said pawl orlatch I34 and which engages pin 86 on the roller'of curtain D, thuskeeping it from movement until said pawl or latch I 34 is disengagedfrom pin 86. Fig. 36 shows the parts in this relationship, curtain No. 1(C) having traveled nearly all the way across the exposure opening. PinI02 in knob 4 has been engaged in one of the index plate holes (Figs. 16and 19), which allows the said curtain C to travel nearly all the wayacross the ex osure opening before pin I02 engages said arm I36 forcingit outward, thus disengaging said pawl or latch I34 from pin 96,allowing curtain No. 2 (D) to close.

It will be seen that by sett'ng knob 4 carrying pin I02 in various holes98, 9 in the index plate 95, the curtain D can be caused to commence itsmovement at any predetermined time after curtain No. 1 (C) starts. Forexample, if pin I02 were set in index hole 980 (Fig. 29), curtain No. 2(D) would be caused to move almost immediately after the curtain No. 1-(C) started its motion. This would'create a very narrow slot during thecurtain travel across the exposure opening. If, however, pin I02 wereengaged in index plate opening 98B (Fig. 29), the slot would be formedat approximately half the distance of the exposure opening, but if thepin I02 were placed as actually shown in Fig. 29, a full exposureopening would occur; That is, curtain No. l (C) would travel all the wayacross the exposure opening before curtain No. 2 (D) would be released.If however, pin I02. were engaged in index plate hole 98A, curtain-No-1(C) would open upon the initial pressure of shutter release button I0,and since the total travel of index plate 95 is approximately threequarters of a revolution, said pin I02 would not travel far the indexplate 95 would be in the position shown in Fig. 38.

When curtain No. 1 (C) is released as indicated in Fig. 29, index plate95 revolves in a clockwise direction until it reaches the position shownin Fig. 38, carrying with it stop pin 99 and retarding pin I00. Justbefore said retarding pin I 00 reaches the position shown in Fig. 38, ithad to pass a spring I31 shown in Figs. 25 and 36 as secured to cameracase A, forcing it to yield far 'enough to allow pin I 00 to pass. Afterpin I00 passes, the spring I31 again assumes its normal position. Stoppin'99 engages an upturned portion I38 (Fig. 38) of spring I31, forminga definite stop. The shutter cannot bounce or revolve in the oppositedirection, because pin I00 would again have to pass spring I31, but theshutter would not have sufficient power on the rebound to depress saidspring I3! to allow it to pass, thus forming a fixed stop on the firstcurtain shutter parts.

' During the foregoing operation, slot I M insheave 89 traveled in aclockwise direction, thus allowing a clear passage for pin 86.whenreleased.

When pin 86 has been released it will travel to the end of the slot andstop, as illustrated in Fig. 41. It will be seen that'when the windingknob 4 is turned, thus turning shaft '90 and sheaves 89, 89A, indexplate 95 and curtain roller 83 will also be caused to turn throughengagement of pin 86 with the end of slot IM and sheave 89. The windingmotion is continued until stop pin 99 reaches the position shown in Fig.29 in contact with stop I39. The shutter will now be reset ready forsubsequent exposures. The knob 6, best shown in Fig. 34, would be in theposition there shown, that is, the pointer of knob 6 would be oppositeposition [-3 on scale I when either so-called slow speed or bulbexposures are being made. However, on instantaneous exposures, theexposure obtained would be that for which knob 4 and dial 5 called for(best shown in Fig. 33), but to make a bulb exposure it is necessary forthe indicator on knob 4 to be set at B (bulb) ondial 5 to have a.correctly functioning bulb exposure. However, a bulb exposure can bemade if the indicator on dial 4 be set at B (bulb) on dial 5, and theindicator on knob 6 would be any place on dial 1 (Figs. 1, 31 and 34)Moreover, upon the release of the said shutter release button I0 whenmaking a bulb exposure, the speed called for on knob 6 and dial 1 wouldbe added to the-bulb exposure after the releasing of the said release orexposure button I0. The dials in Figs. 33 and 34 are set to obtain anexposure of approximately .001 of a second. In changing theinstantaneous exposure for ,5 of a second to .001 of a second, the bulbknob 6 is not changed in relation to the dial I. The relation of lmob 6and dial I is changed only when slow speed exposures are wanted and atsuch time the indicator on knob 4 will point to the Indication S over 25on the dial 5. When instantaneous exposures are made, the mechanism ofthe slow shutter timing device is positioned as shown in Fig. 35.

As pointed out hereinbefore, this camera is capable of making so-calledslow exposures in the nature of .1 of a second to one second or longer.These exposures are automatically timed. In order to make an exposure ofthe so-called slow type, knob 6 is set at one second on dial 1 (Figs. 31and 34), and the indicator on knob 4 is set at 258 on dial 5, as inFig.31.

Assuming the shutter has previously been wound and is ready foroperation, the exposure is made by depressing the shutter release buttonI0, which moves bar or spindle I2I,- I22 (Fig. 29) rearward or away fromthe front of the camera case A, allowing arm I36 and pawl I34 to bemoved into the position shown in Fig. 36. At the same time, the shaft orrod I24 (Fig. 25) will be'caused to be moved downward as previouslydescribed concerning instantaneous exposure, thus depressing filmwinding pawl 54- as shown in Fig. 37, and freeing holding pin 55,allowing to function the slow shutter speed cam 56 which is part of theshutter assembly previously referred to, thus allowing the curtain No. 1(C) to travel across the exposure opening from left to right for itsfull travel. The position of pin 55 is shown in dotted lines Fig. 36,just before it reaches the end of its travel and said pin is shown inits full travel position in Fig. 38. In said Fig. 38, curtain No. 1 (C)has traveled all the way across and so long as the shutter release-button I0 is depressed, curtain No. 2 (D) cannot travel. However, indexplate 95 rotates with curtain No. 1 (C), carrying with it pin I02 whichis shown in Fig. 36 as about to engage .arm I35, and, as shown in Fig.38, pin I02 has engaged arm I36 and has withdrawn pawl I34 from the faceof roller pin 86 of curtain No. 2 (D) which now starts to travel but isheld up by roller pin 81 of said curtain No. 2 (D) by detent I40, asshown in Fig. 38.

The slow shutter operating cam 56 will be in the position shown in Fig.32, depressing arm I. Said arm MI is attached to a shaft I42 which, asshown in Figs. 36, 38, 39, 41, has fast thereon a second arm Q43. A linkI44 is con.- nected to said am I43 by shoulder rivet I45 and isconnected to detent I by a second shoulder rivet I46, as shown in saidFigs. 36, 38, 39, 41. The detent I40 will now be in the position shownin Fig. 38. The curtain roller 83 will now start to rotate, carryingwith it pin 81 which is now in contact with detent I40, which detentwill be driven back by pin 81 until said detent is pushed far enoughback for pin 87 moving clockwise to clear the detent. The position ofpin 81 and detent I40 just before pin 81 clears said detent I40 is bestshown in Fig. 39.

As said detent I40 is pushed away by pin 81, a toothed sector I41, bestshown in Figs. 36 and 39 as pivoted on pin I48, is caused to rotateabout its axis through shoulder rivet I 48a connecting detent I40 tosaid sector. Said sector turns against the force of spring I and causesa notched wheel I50 to rotate through a pinion I50a on stud shaft I50bpast an escapement I5I pivoted on pin I52, thus causing said escapementto vibrate on its said axis I52. To said pivotal pin I52 is alsoattached a lever I53 having a pin formation on its outermost end I54riding in a groove I55 of an inertia balance I56, thus causing saidinertia balance to be vibrated on its axial pin I51, thereby retardingthe motion or the rate of acceleration of notched wheel I50.

This construction is most clearly shown in Figs. 36,- 38, 39 and 41. I

When the pin 01 pushes detent I40so as to allow pin 81 to pass, curtainNo. 2 (D) on roller 33 will then be allowed to close, thus ending theexposure time of one second. The positions of the curtains just beforepin 81 passes detent I40 will be that shown in Fig. 39 with curtain No.1 (C) wound all the way up on roller I08. Curtain No. 2 (D) will haveadvanced to the exposure opening. After pin 81 passes detent I40 andcurtain No. 2 (D) has traveled across the exposure opening, the twocurtains will then appear as in Fig. 41, both curtains being closed andcapped.

It is important to be able to time the slow shutter speeds. Thereforethe sector I41 has an extending arm I58, clearly shown in Figs. 36, 38.39 and 41. When the camera exposure is set for One full second, a stoppawl I58a, more fully referred to hereinafter, is in the position shownin Fig. 39, and knob 6 has the relation to dial '1 shown in Fig. 31.Thedistance between said arm I58 and the end of stop pawl IBM is then atits greatest point of adjustment. If the space between the curved end ofstop pawl I58a and arm I58 is shortened, the travel of detent I40 willalso be limited-that is, pin 81 will travel a greater distance beforeengaging detent I40 and the total time that notched wheel I50 is rotatedwill be lessened.

It will be seen that if the stop pawl I580, is rotated far enough toengage the arm I58, the detent I40 will be held back clear of pin 81 andno retarding will take place. This is the position of stop pawl I58awhen instantaneous and bulb exposures are being made as indicated inFig. 35, with the dial settings as indicated in Fig. 33.

In Fig.4l, the entire curtain has traveled all the way across theexposure opening, and the pin 81 will be in the position shown in saidfigure. The detent I40 will be caused to resume its previous positionunder the influence of spring I49, returning the sector to the positionshown in Fig. 36.

It will be clear from the foregoing description that the slow shutterspeed mechanism does not come into action excepting when cam 56 hasrotated all the way around to the position shown in Fig. 32, thusforcing outwardly the bar I.

When instantaneous exposures are made, pin I02 (Fig. 16) is engaged inone of the holes 98 on the index plate 95 in advance of the twentyfifthof a second exposure. Said pin I02 will en gage arm I36, therebyreleasing pawl I34 from pin 85 before the cam 56 engages with bar Hi, topull detent I40 into position. Thus, even though the slow shutter speedmechanism is set for a slow speed, since curtain N0. 2 (D) would havebeen released before detent I 40 comes into position, the exposure willbe as set for byknob 4 with respect to dial 5. Thus, it is not necessarywhen making instantaneous exposures to pay any attention to knob B anddial I. The only time that dial I needs to be set is when slow shutterspeeds are used or when a bulb exposure is to be made. However, theproper place for knob 6 with respect to 'dial 1 will be in the B-lposition (Fig. 31) when all instantaneous exposures are made, becausethen itwill be possible to use any of the speeds called for on knob 4and dial 5, including all instantaneous exposures and bulb

